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/********************************************************************************
* fcntl.h
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name Gregory Nutt nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
********************************************************************************/
#ifndef __FCNTL_H
#define __FCNTL_H
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
/********************************************************************************
* Definitions
********************************************************************************/
/* open flag settings for open() (and related APIs) */
#define O_RDONLY 0x01 /* Open for read access */
#define O_WRONLY 0x02 /* Open for write access */
#define O_RDWR 0x03 /* Open for both read & write access */
#define O_CREAT 0x04 /* Create file/sem/mq object */
#define O_EXCL 0x08 /* Name must not exist when opened */
#define O_APPEND 0x10 /* Keep contents, append to end */
#define O_TRUNC 0x20 /* Delete contents */
#define O_NONBLOCK 0x40 /* Don't wait for data */
#define O_SYNC 0x80 /* Synchronize output on write */
#define O_DSYNC OSYNC
#define O_RSYNC 0x00 /* Sychronize input on read */
#define O_ACCMODE 0x00 /* Required by POSIX */
#define O_NOCTTY 0x00 /* Reqired by POSIX */
#define O_RDOK O_RDONLY /* Not POSIX */
#define O_WROK O_WRONLY /* Not POSIX */
/* fcntl() commands */
#define F_DUPFD 0 /* Duplicate a file descriptor */
#define F_GETFD 1 /* Read the file descriptor flags */
#define F_GETFL 2 /* Read the file status flags */
#define F_GETLEASE 3 /* Indicas what type of lease is held on fd (linux) */
#define F_GETLK 4 /* Check if we could place a lock */
#define F_GETOWN 5 /* Get the pid receiving SIGIO and SIGURG signals for fd */
#define F_GETSIG 6 /* Get the signal sent */
#define F_NOTIFY 7 /* Provide notification when directory referred to by fd changes (linux)*/
#define F_SETFD 8 /* Set the file descriptor flags to value */
#define F_SETFL 9 /* Set the file status flags to the value */
#define F_SETLEASE 10 /* Set or remove file lease (linux) */
#define F_SETLK 11 /* Acquire or release a lock on range of bytes */
#define F_SETLKW 12 /* Like F_SETLK, but wait for lock to become available */
#define F_SETOWN 13 /* Set pid that will receive SIGIO and SIGURG signals for fd */
#define F_SETSIG 14 /* Set the signal to be sent */
/* close-on-exec flag for F_GETRL and F_SETFL */
#define FD_CLOEXEC 1
/* Arguments to F_SETLEASE */
#define F_RDLCK 0 /* Take out a read lease */
#define F_WRLCK 2 /* Take out a write lease */
#define F_UNLCK 3 /* Remove a lease */
/* These are the notifications that can be received from F_NOTIFY (linux) */
#define DN_ACCESS 0 /* A file was accessed */
#define DN_MODIFY 1 /* A file was modified */
#define DN_CREATE 2 /* A file was created */
#define DN_DELETE 3 /* A file was unlinked */
#define DN_RENAME 4 /* A file was renamed */
#define DN_ATTRIB 5 /* Attributes of a file were changed */
#define S_IFMT 0170000
#define S_IFSOCK 0140000
#define S_IFLNK 0120000
#define S_IFREG 0100000
#define S_IFBLK 0060000
#define S_IFCHR 0020000
#define S_IFDIR 0040000
#define S_IFIFO 0010000
#define S_ISUID 0004000
#define S_ISGID 0002000
#define S_ISVTX 0001000
#define S_IRWXU 0000700
#define S_IRUSR 0000400
#define S_IWUSR 0000200
#define S_IXUSR 0000100
#define S_IRWXG 0000070
#define S_IRGRP 0000040
#define S_IWGRP 0000020
#define S_IXGRP 0000010
#define S_IRWXO 0000007
#define S_IROTH 0000004
#define S_IWOTH 0000002
#define S_IXOTH 0000001
#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
#define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
/********************************************************************************
* Public Type Definitions
********************************************************************************/
/* struct flock is the third argument for F_GETLK, F_SETLK and F_SETLKW */
struct flock
{
short l_type; /* Type of lock: F_RDLCK, F_WRLCK, F_UNLCK */
short l_whence; /* How to interpret l_start: SEEK_SET, SEEK_CUR, SEEK_END */
off_t l_start; /* Starting offset for lock */
off_t l_len; /* Number of bytes to lock */
pid_t l_pid; /* PID of process blocking our lock (F_GETLK only) */
};
/********************************************************************************
* Public Variables
********************************************************************************/
/********************************************************************************
* Public Function Prototypes
********************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/* POSIX-like File System Interfaces */
EXTERN int creat(const char *path, mode_t mode);
EXTERN int open(const char *path, int oflag, ...);
EXTERN int fcntl(int fd, int cmd, ...);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __FCNTL_H */
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